21818560

素因数分解:

$2^6\times 5^1\times {\mathrm{41}}^1\times {\mathrm{1663}}^1$

素因数の和:1721

約数の個数: 56

約数和(自身を含む): 53254656

約数和(自身を除く): 31436096

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 160, 164, 205, 320, 328, 410, 656, 820, 1312, 1640, 1663, 2624, 3280, 3326, 6560, 6652, 8315, 13120, 13304, 16630, 26608, 33260, 53216, 66520, 68183, 106432, 133040, 136366, 266080, 272732, 340915, 532160, 545464, 681830, 1090928, 1363660, 2181856, 2727320, 4363712, 5454640, 10909280, 21818560]

約数ペア:

[(1, 21818560), (2, 10909280), (4, 5454640), (5, 4363712), (8, 2727320), (10, 2181856), (16, 1363660), (20, 1090928), (32, 681830), (40, 545464), (41, 532160), (64, 340915), (80, 272732), (82, 266080), (160, 136366), (164, 133040), (205, 106432), (320, 68183), (328, 66520), (410, 53216), (656, 33260), (820, 26608), (1312, 16630), (1640, 13304), (1663, 13120), (2624, 8315), (3280, 6652), (3326, 6560)]